Well, you need an IQ at about 30 to open a door. I see no doors made by Giants.
Making cheese will need milking, refining and other processes.
They herd their mammoths like our early hunters and gatherers figured out.
They got weapons made out of wood and stone, and clothes made of leather.
They know fire and to eat cooked meat.
They know to make farmers sacrifice cows to them for leaving them alone. Can be compared with protection money from gangs and crimelords today.
And how to they get those big, ornate chest filled with goodies into their camps?
They're a bit further than our stone age counterparts I'd reckon.
Agreed. Plus they seem to have artistic concepts. They are clearly a sentient, sapient race, albeit a primitive one - which seems to work fine for them.
I would like a great deal for some giant content. I love seeing them in the game, I never kill or mess with them since they happily mind their own business - seriously, giants, despite their size and strength, are practically the least threatening race in game, and are pretty friendly too - and they do shout warnings when they don't want you about (in their camps). If people are saying "well, they aren't very clear warnings so they aren't very smart" I have to wonder about that players smarts - giant yells angrily at me... hmmm, what could it mean? Oh well, I'll continue to approach...
Humans, Mer etc are the ones up in each others faces and all that.
Ah, but to to be able to work out how to communicate with the giants somehow, maybe help them. Maybe have the option to stab any fat Nord who gives me a quest to collect a giants toe multiple time. And then take that Nord's toes and feed them to the foxes, as a warning to others - this Dragonborn is a friend of the giants.
Perhaps you could compare them with Neanderthals. They are brutish and stupid, don't have any language, but still has primitive crafts like cheesemaking.
Only if you compare them with the outdated view of neanderthals (like way outdated, and becoming more so with each year and archeological discovery).
Plus they do have language.
And not really sure what about giants is inherently "stupid". Primitive doesn't equal stupid (compare with, say, the Troll in the first Harry Potter film).